While studying out of the BR Organic Chem book, I noticed that there is a lot of detailed information about terpenes in section 4. How necessary is it to know terpenes for the mcat??
Exactly!!! They are definitiely a tested topic, but in terms of structure and biology, not alkene reactivity.
Terpenes should be understood as a class of compounds. Know the 5, 10, 15, etc... rule and the connectivity. Know that they are UV active because of their pi-bonds and that they can undergo coupling reactions.